Charged Double/ Food not up to standard

Ordered a meal on promotion - meal for two (2 pies, two chips, two cold drinks). Can't remember the exact price, but we ended up being charged double.. So in other words we paid for TWO of the meals instead of just one. After waiting for a long time of waiting at the till listening to the woman behind the till insuring me that me money would be debited back into my account within 24 hours, I said it's fine don't worry. By this time I was even hungrier so I just wanted the food and go home.. When I got the pie out of the packaging, it was burnt pitch-black on the bottom and really wasn't what i was used to from King Pie.